The 3PE (Three-Layer Polyethylene) external coating is a high-performance anti-corrosion structure composed of fusion-bonded epoxy (FBE) as the inner layer, adhesive (AD) as the middle layer, and polyethylene (PE) as the outer layer.
It features high mechanical strength, excellent electrical insulation, stable process parameters, and environmental friendliness, and is widely used in oil and gas transportation, urban water supply, heating systems, and gas pipelines.

Pipe Loading → Conveying → Shot Blasting (Rust Removal) → Induction Heating → FBE Coating → AD & PE Extrusion Coating → Water Cooling → Conveying → Pipe End Grinding → Unloading

Main Equipment Composition

Surface Treatment: Shot blasting machine, cyclone dust collector, pulse dust remover

Heating System: Induction heating equipment

Coating System: FBE powder coating unit, adhesive extruder, PE extruder

Cooling System: Water spraying and cooling device

Conveying System: Pipe loading/unloading platform, turning rollers

Control System: PLC automatic control system

Auxiliary Equipment: PE beveling machine, hydraulic lifting system, exhaust & ventilation system

Cost Reduction - High sealing performance, energy-saving, and environmentally friendly.

Long Service Life - Easy installation and construction, lifespan up to 30-50 years.

Excellent Impact Resistance - Performs well even under low temperatures; low water absorption.

Superior Anti-Corrosion Performance - Reliable protection with simple and economical process.

Fully Automatic Operation - PLC control with intelligent sensors for position, speed, and energy monitoring ensures precision and efficiency.

3-layer PE coated steel pipes are widely used for:

Oil and gas transmission pipelines

Urban gas and water supply systems

District heating networks

Underground and industrial anti-corrosion projects

This technology has been widely applied in major domestic and international projects, with products exported to Europe, the Middle East, Central Asia, Africa, and Russia.

Our team

Delivery

Exhibition

Certifications

1. company profile

Qingdao Huashida Machinery Co., Ltd. is located in Qingdao High & New Technology Industrial Area- Qingdao Huashida industrial Park, covers an area of about 4000 square meters. We have tens of years experience in plastic pipe, sheet, and board extrusion lines, and pipe joints and welding tools such as heat shrinkable sleeve, Electro fusion sleeve etc.

2. main products

Our main products include as following,HDPE PU pre-insulation Jacket Pipe extrusion line,3PE steel pipe anticorrosion&coating machinery,Rubber&plastic foam flexible insulation tube/sheet production line,HDPE water supplying pipe extrusion line,PE PP sheet board extrusion line,Heat shrinkable sleeve production line,Hollow wall spiral pipe production line,Plastic welding rod extrusion line,Radiation cross-linked PE heat shrinkable sleeve,Electro fusion tape,Portable extrusion welder.

Our machines make products what are widely used as jacket pipe of PU foam insulation pipe in municipal heating pipe system; Municipal water supplying and drainage pipeline; Oil and gas pipeline; Pipe joints of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;
Besides manufacturing machines, we also make Heat shrinkable sleeves and electro fusion sleeves and plastic welders, which are widely used as pipe joints and sealings of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;

4. Our certificates and Patents

5. Global market
Our purpose is to supply highest cost-effective products and the most suitable solutions to our clients, as well as intimate help and service, on this basis we reach a win-win situation.
For over 14years We have exported to many foreign countries, such as Russia, Iran, Turkey, U. A. E, Sudan, Ukraine, Uzbekistan, Azerbaijan, South Asia, Poland etc.

6. Core Team

The guarantee period is 12 months from the date of installing, but no more than 14 months from the date of delivery. After this period we are obliged to provide with lifelong service at the expense of Buyer.During the warranty period we are responsible to provide trouble shootings and help the customer to solve the problems, provide spare parts which are broken, except breakings caused by the Buyer.We will provide the technical service train the workers from the buyers for free.We can also send technicians to the buyer's companies abroad for help installation and testing the lines. But the buyer shall pay for the round trip tickets, accommodation, transportation, medicine treatment and insurance of the technicians in foreign countries and some salary accordingly.